MPS Racing Instructions All instructions are Adobe PDF file format. They should come right up in your browser. If you don't have an Acrobat Viewer you can download one for free by clicking on the link below. Frequently Asked Questions – Ignition Control | FiTech ... Does the Ignition Timing jump from each setting, or is there interpolation? There is interpolation – for example, if your settings say 25 deg @ 1100 RPM & 45kPa, 15 deg @ 1100 95kPa, 40 @ 3000 & 45kPa, 31 @ 3000 & 95kPa, but you’re driving at 1800 & 65kPa, the timing will be between all of those values – at about 26.7 degrees.